Package ghidra.pcode.memstate

Class MemoryBank

java.lang.Object

ghidra.pcode.memstate.MemoryBank

Direct Known Subclasses:

MemoryImage, MemoryPageBank, UniqueMemoryBank

public abstract class MemoryBank
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field	Description
protected MemoryFaultHandler	faultHandler

Constructor Summary

Constructors

Constructor	Description
MemoryBank(AddressSpace spc, boolean isBigEndian, int ps, MemoryFaultHandler faultHandler)	A MemoryBank must be associated with a specific address space, have a preferred or natural pagesize.

Method Summary

Modifier and Type	Method	Description
static long	constructValue(byte[] ptr, int offset, int size, boolean bigendian)
static void	deconstructValue(byte[] ptr, int offset, long val, int size, boolean bigendian)
int	getChunk(long addrOffset, int size, byte[] res, boolean stopOnUnintialized)
int	getInitializedMaskSize()
MemoryFaultHandler	getMemoryFaultHandler()
protected abstract MemoryPage	getPage(long addr)
int	getPageSize()	A MemoryBank is instantiated with a \e natural page size.
AddressSpace	getSpace()
boolean	isBigEndian()
void	setChunk(long offset, int size, byte[] val)
void	setInitialized(long offset, int size, boolean initialized)
protected abstract void	setPage(long addr, byte[] val, int skip, int size, int bufOffset)
protected abstract void	setPageInitialized(long addr, boolean initialized, int skip, int size, int bufOffset)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

faultHandler

protected final MemoryFaultHandler faultHandler

Constructor Detail

MemoryBank

public MemoryBank(AddressSpace spc,
                  boolean isBigEndian,
                  int ps,
                  MemoryFaultHandler faultHandler)

A MemoryBank must be associated with a specific address space, have a preferred or natural pagesize. The pagesize must be a power of 2.

Parameters:

spc - is the associated address space

isBigEndian - memory endianess

ps - ps is the number of bytes in a page (must be a power of 2)

faultHandler - memory fault handler

Method Detail

getMemoryFaultHandler

public MemoryFaultHandler getMemoryFaultHandler()

Returns:

memory fault handler (may be null)

isBigEndian

public boolean isBigEndian()

Returns:

true if memory bank is big endian

getPageSize

public int getPageSize()

A MemoryBank is instantiated with a \e natural page size. Requests for large chunks of data may be broken down into units of this size.

Returns:

the number of bytes in a page.

getInitializedMaskSize

public int getInitializedMaskSize()

Returns:

the size of a page initialized mask in bytes. Each bit within the mask corresponds to a data byte within a page.

getSpace

public AddressSpace getSpace()

Returns:

the AddressSpace associated with this bank.

getPage

protected abstract MemoryPage getPage(long addr)

setPage

protected abstract void setPage(long addr,
                                byte[] val,
                                int skip,
                                int size,
                                int bufOffset)

setPageInitialized

protected abstract void setPageInitialized(long addr,
                                           boolean initialized,
                                           int skip,
                                           int size,
                                           int bufOffset)

setChunk

public void setChunk(long offset,
                     int size,
                     byte[] val)

setInitialized

public void setInitialized(long offset,
                           int size,
                           boolean initialized)

getChunk

public int getChunk(long addrOffset,
                    int size,
                    byte[] res,
                    boolean stopOnUnintialized)

constructValue

public static long constructValue(byte[] ptr,
                                  int offset,
                                  int size,
                                  boolean bigendian)

deconstructValue

public static void deconstructValue(byte[] ptr,
                                    int offset,
                                    long val,
                                    int size,
                                    boolean bigendian)